SECTION 2 - - CONTROLS, INSTRUMENTS AND OPERATION
Ground Speed Conversion Chart
The size of the rear tyres on your tractor may vary
from those shown in the ground speed charts. When
an alternative size of tyre is fitted, multiply the
ground speeds shown in the charts by the conversion
factors shown:
2--66
Models with Light Duty Rear Axle
Tyre Size
Factor
18.4R--30
0.935
12.4--32
0.839
16.9R--34
0.968
13.6R--38
0.968
16.9R--38
1.032
All Models with Heavy Duty Rear Axle
Tyre Size
Factor
18.4R--30
0.879
12.4--32
0.788
16.9R--34
0.909
18.4R--34
0.939
13.6R--38
0.909
16.9R--38
0.970
20.8R--38
1.061
18.4R--42
1.061
14.9R--46
1.079
Tyre Size
Factor
480/70R--34
0.968
480/70R--38
1.032
540/65R--38
1.032
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Tyre Size
Factor
480/70R--34
0.909
520/70R--34
0.939
480/70R--38
0.970
540/65R--38
0.970
650/60R--38
1.000
650/65R--38
1.061
320/90R--50
1.061
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